JPS6152470A - Flow regulation valve - Google Patents

Abstract

PURPOSE:To facilitate regulation of flow by providing at least two types of changeover paths having different diameter at the facing section with the liquid path of pin while crossing at the central portion of pin. CONSTITUTION:A pin 6 is mounted rotatably in a tubular hole section 4 crossing perpendicularly with the liquid path 3. Two types of changeover paths 7A, 7B having different diameter are formed at the facing section with the liquid path 3 of pin 6. The gap T1 of said path is set larger than the diameter T2 of liquid path 3 to prevent simultaneous communication of said paths 7A, 7B with the liquid path 3. Two kind of flows can be selected by rotating the pin 6 and communicating any one of said paths 7A, 7B with the liquid path 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a flow rate regulating valve used in a beverage dispenser or the like.

(b) Conventional technology For example, in a beverage dispenser, in order to obtain a stable flow rate in a liquid circuit, it is necessary to
A needle step valve disclosed in Japanese Patent No. 31300 and the like is used. When it comes to carbonated drinks, we sell high carbonated drinks, low carbonated drinks, non-carbonated drinks, and free drinks, but K is a needle that supplies carbonated water, and the carbonic acid concentration set at the time of factory production can be changed on the market. The flow rate of the valve is changed by rotating the needle. However, even if an attempt is made to adjust the flow rate by changing the number of rotations of the needle, the carbon dioxide flow rate will differ depending on each device due to variations in cutting accuracy during the manufacturing of the needle valve. For example, it has been confirmed that the cutting range and the rotation angle of the needle vary by more than Ioo' in 2Q and 05+n+a. Therefore, even if the needle is set to dispense non-carbonated beverages when the needle is opened 2.5 turns from the closed position, and low-carbonated beverages are dispensed when the needle is opened 3 turns from the closed position, all devices will not be able to supply non-carbonated beverages. Turning the needle 0.5 rotations from the supply state does not necessarily result in the supply state of a low carbonated drink. The reason why the needle valve for carbonated water is opened 2.5 turns even when dispensing non-carbonated drinks is to prevent dead water in the carbonated water pipes. This is for injecting water into drinks.

FIG. 4 shows the configuration of a general needle/dollar valve in a side sectional view. The two-needle valve includes a valve body (12) comprising a liquid passage I that communicates the inlet side and the outlet side, a cylindrical hole α9 perpendicular to the passage α, and a pin housing that fits into the hole α. The pin 0, which has a threaded thread αη formed at its tip to be screwed into the threaded hole αe of the valve body C12, is configured to move up and down through the hole α5) by rotation. When the valve is closed, the pin body (13A
). However, when cutting, the recess (1
It is difficult to keep the processing of 81 constant, and it is difficult to adjust between no-carbonation and low-carbonation. In addition, in machining the pin α, the center line of the tip where the thread αη was formed was the pin body (13 people).
It is also difficult to align the center line with the center line of the valve body α2, and in consideration of this, an appropriate gap is required between the pin αJ and the valve body α2.

Therefore, this gap also affects the flow rate, making the above-mentioned adjustment even more difficult.

(c) Problems to be solved by the invention As described above, the flow rate of each needle valve is not constant due to the irregularities in the cutting process, and especially when applied to a beverage dispenser, it is difficult to adjust between no carbonation and low carbonation. difficult.

In view of the above points, the present invention provides a flow rate regulating valve that eliminates variations in flow rate caused by machining accuracy.

B) Means for Solving the Problems The present invention forms a cylindrical hole perpendicular to the liquid passage of the valve body that communicates with the inlet side and the outlet side of the liquid, and the liquid of the pin that fits into the hole. At least two types of switching passages, each with a different diameter, are provided in the part facing the passage so as to intersect at the center of the pin, and when the pin rotates, one of the switching passages connects to the liquid passage, and the other one connects to the liquid passage. The structure is formed on a pin so that it faces the inner wall of the

(E) The flow rate is switched by selecting one of the switching passages by rotating the working pin.

(f) Embodiment Figures 1 to 3 show valves according to the present invention.
The valve body (5) is equipped with a liquid passageway (3) that communicates with the inlet side (1) and the outlet side (2).
) is formed to form a cylindrical hole (4). A pin (6) that fits into this hole (4) is rotatably attached to the valve body (5) by an E-ring (8), and a pair of pins (6) are arranged facing each other with the liquid passageway (3) in between. O-ring (9) αω
This provides a seal between the sliding surface of the valve body (5) and the sliding surface of the valve body (5).

In addition, a groove (111) is formed on the end surface of the pin (6) to fit a flathead screwdriver.In addition, in the part of the pin (6) facing the liquid passage (3), there are two switching passages with different diameters. (7A) (7B).This switching passage (7A)
) (7B) is larger than the diameter T of the liquid passage (3) (
T+ > T t ), which prevents both switching passages (7A) and (7B) from communicating with the liquid passage (3) at the same time, and therefore prevents the pin (6
) is rotated so that one switching passage communicates with the liquid passage (3), the other switching passage faces the inner wall of the hole (4) and therefore does not communicate with the liquid passage (3). Like this pin (6
) is rotated to connect one of the switching passages (7 persons) (7B) to the liquid passage (3), thereby selecting two types of flow rates.

In addition, in this example, the switching passages (7A) (7B) are arranged at 180 degrees from each other.
Because they intersect at ゜, some switching passages (7 people)
(7B) is in communication with the liquid passage (3), and the pin (6
) by 45°, which switching passage (7A) (
7B) also faces the inner wall of the hole (4) and the valve is in a closed state.

Furthermore, since the pin (6) does not have a threaded portion, liquid leakage can be prevented even if the central axes of the threaded portion and the pin body do not precisely match as in the conventional needle valve shown in FIG. That is, in FIG. 1, it is difficult to accurately align the center of the pin body (13A) with the center line of the threaded part, and therefore there is a gap between the sliding surface of the valve body (1z) and the pin body (13A). However, in the configuration of the present invention, since there is no threaded part, it is necessary to provide a gap between the valve body (5) and the pin (6). can be processed without any liquid leakage.

(F) Effects of the Invention According to the present invention, not only can the flow rate be easily adjusted by rotating the pin at a predetermined angle of 360 degrees or less, but also the flow rate is constant because a switching passage with a predetermined diameter is selected. . Moreover, since there is no threaded portion, the sliding surfaces of the pin and the valve body can be aligned during machining, resulting in less liquid leakage and stable flow rate adjustment. The switching passages are formed so as to intersect with each other at the center of the pin, that is, on the same plane cross section of the pin, so that they are easy to manufacture.

[Brief explanation of drawings]

Fig. 1 is a top view of the valve according to the present invention, Fig. 2 is a side view showing the main parts in cross section, and Fig. 3 is a front view.
The figure shows a general configuration diagram of a needle valve. (1)...Inlet side, (2)...Exit side, (3)
...liquid passage, (4)...hole, (5)...valve body, (6)...pin, (7A) (7B)...switching passage.

Claims (1)

[Claims] 1. It consists of a valve body equipped with a liquid passage that communicates the inlet and outlet sides of the liquid and a cylindrical hole that is perpendicular to the liquid passage, and a pin that fits into the hole, At least two types of switching passages having different diameters are provided in a portion facing the passage so as to intersect with each other at the center of the pin, and one of the switching passages is connected to the liquid passage by rotation of the pin. The flow rate regulating valve is characterized in that the other part is formed on the pin so as to face the inner wall of the hole.